Low-frequency dielectric properties of the oral mucosa (CROSBI ID 529390)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Lacković, Igor ; Stare, Zoran
engleski
Low-frequency dielectric properties of the oral mucosa
Low-frequency (≤ 1 MHz) electrical conductivity and permittivity spectra of the oral mucosa were reconstructed from impedance measurements at various regions (tongue, buccal mucosa, hard palate) of the oral cavity. Impedance magnitude and phase were measured with the HP4284A LCR meter in the frequency range from 30 Hz to 1 MHz. Bipolar intraoral measurement probe was used. In order to obtain conductivity and permittivity spectra from measured impedance data, the geometry factor of the probe (cell factor) was determined theoretically. Namely, numerical modeling using the finite-element method was used to calculate the geometry factor. The FEM model was also used to study the sensitivity field of the probe and the penetration depth. The results show typical dispersion characteristics observed in α -, and β -dispersion range of biological tissues. Possibilities of correcting electrode polarization, which causes error at lower frequencies are considered.
impedance spectrum; in vivo measurement; FEM model; cell factor; probe sensitivity
DOI: 10.1007/978-3-540-73841-1_42 ; ISBN (Online) 978-3-540-73841-1
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Podaci o prilogu
154-157.
2007.
objavljeno
Podaci o matičnoj publikaciji
13th International Conference on Electrical Bioimpedance and 8th Conference on Electrical Impedance Tomography 2007 : ICEBI 2007 ; IFMBE Proceedings ; Vol. 17
Scharfetter, Hermann ; Merwa, Robert
Berlin : Heidelberg : New York: Springer
978-3-540-73840-4
1727-1983
Podaci o skupu
13th International Conference on Electrical Bioimpedance and 8th Conference on Electrical Impedance Tomography (13 ; 2007)
predavanje
29.08.2007-02.09.2007
Graz, Austrija